10-Day Weather Forecast - Monticello, IL

Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 104.

Mostly clear in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the lower 70s. Southwest winds around 5 mph. Chance of rain 20 percent.

Sunny with highs in the lower 90s. West winds around 5 mph, becoming north in the afternoon. Heat index values up to 102.

Mostly clear. Humid with lows in the upper 60s. Northeast winds 5 to 10 mph.

Mostly clear. Highs in the mid 80s.

Mostly clear. Lows in the lower 60s.

Mostly clear. Highs in the mid 80s.

Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s.

Mostly clear. Highs in the mid 90s.

Mostly clear. Lows in the lower 70s.

Mostly clear. Highs in the mid 90s.

Partly cloudy. Lows in the lower 70s.

Partly cloudy. Highs in the upper 80s.

Clear. Low temperature around 70F. Dew point will be around 66F with an average humidity of 74%. Winds will be 1 mph from the S.

Mostly sunny. High temperature around 85F. Dew point will be around 66F with an average humidity of 66%. Winds will be 1 mph from the S.

Clear. Low temperature around 66F. Dew point will be around 65F with an average humidity of 79%. Winds will be 2 mph from the SE.

Mostly sunny. High temperature around 85F. Dew point will be around 67F with an average humidity of 68%. Winds will be 4 mph from the S.

Clear. Low temperature around 67F. Dew point will be around 65F with an average humidity of 75%. Winds will be 4 mph from the S.